Crews will soon begin to replace all 3,336 fluorescent lamps inside the north and south tubes of the tunnel with high-efficiency LED lights, a process that will take several months, the Port Authority of New York and New Jersey announced today.

The Port Authority launched its "Greening the Holland Tunnel Initiative" as part of its continued focus to "provide responsible stewardship of the region's environment," the statement said.

The replacement bulbs will light the tunnel in a more environmentally-friendly and energy-efficient manner, and will provide more than $250,000 in annual energy savings, according to Port Authority officials.

The replacement lights should all be installed by the fall.

"The Port Authority is committed to improving the environment for the hundreds of millions of people who use, live and work near our facilities," Port Authority Chairman David Samson said in the statement.

The Port Authority is also exploring installing a green roof on the tunnel's administration building.

This would be the first green roof installed on Port Authority property and would provide "operational and environmental benefits," including increased roof longevity, thermal insulation, greenhouse gas and air pollution reductions, and storm water runoff reductions, the statement said.